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Ribbon Jams
Check the following items
if
you are experiencing
frequent ribbon jams:
The ribbon shield is not adjusted properly.
There is improper tracking
of
the ribbon through
the ribbon feed rolls. The ribbon should
not
be
above the rollers more than 0.010
to
0.015 inch
(0.254
to
0.381 mm).
If
the ribbon is above the
rollers, one
of
the following could
be
the cause:
• The rollers are
not
adjusted properly. Check
that the rollers are the same height and are not
cocked.
• The print head cover is hitting the print cable
near the oil reservoir. This can cause the left
side
of
the head cover
to
rise and
lift
the ribbon
off
the print head.
If
this condition is present,
cut a small portion from the head cover where
it hits the head cable.
• The ribbon box may
be
positioned
too
low.
Loosen the
two
screws holding the ribbon box
to
the carrier (one on the left side and one
in
the bottom
of
the box), and raise or lower the
box
for
proper ribbon tracking through the
ribbon rollers. Retighten the screws.
- The ribbon drive rolls are sticking. Remove and
clean the rollers.
There are metal spacers
in
the ribbon roller
assembly between the rubber rolls and the plastic
housing. Replace the rollers
if
either spacer
is
missing (one at the
top
of
the rollers and one at
the bottom).
- The print wires are protruding beyond the face
of
the print head by more than 0.002 inch (0.0508
mm).
The copy control dial
is
improperly set. The dial
should
be
set
for
good print quality on the last
copy and no smudging on the first copy. The
numbers on the copy control dial do not
correspond
to
the number
of
parts
in
the form.
Intermittent
Failures
Troubleshooting
Guide
3-107
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